We have 5 Metal Belt Buckles nos from a jewelry factory.  They date anywhere from the 1970's to within the last few years - use your judgement on vintage - I would estimate that 2 are a bit older (the duller ones) and 3 are on the newer side.  They are all silver tone metal with 2 being a dull finish and 3 being shiny.  They measure between 2" - 2 1/8" in W x about 1 3/8" in L.  The backs can accomadate a belt up to 1 1/4" or so.  There is minor finish damage on 3 of them on the front.